Accumulator grid plate



Sept. 29, 1925; H, KELLER ACCUMULATOR GRID PLATE Filed July 18, 1924 v u l n with. 52:1

zen of Germany,

2 or passages because in Patented Sept. 29, 1925.

UNITED STATES PATENT OFFICE.

ACCUMULATOR GRID PLATE.

Application filed July 18, 1924. Serial No. 726,844.

To all whom it may concern: Be it known that I, HUGO KELLER, a citiresiding at Cannstatton- Neckar, WVurttemberg, Germany, have in- 5 vented certain new and useful Improvements in or Relating to Accumulator Grid Plates, of which the following is a specification.

The present invention relates to a new method of casting accumulator grid plates which is intended for the production especially of fine meshed accumulator grid plates. The purpose of using a fine mesh grid plate is to enable the entire actlve mass to be used up without leaving any residue thereby resulting in ahigh elficiency for a given weight and mass of material. In order to obtain a fine mesh accumulator grid plate, it is necessary that the molten metal should only travel a short way in the mould gate consequence of the loss of heat a premature hardening of the metal takes place before the mould passages are con'ipletely filled. fereuce between the method of the present 2 invention and the method hitherto employed consists in that the molten metal is not pressed into the mould passages lengthwise of and parallel to the grid face as heretofore but into the thickness thereof, and perpendicular to the surface of the grid plate. In this method of working the fluid metal has only to travel a short length of some millimetres. A constructional form of the invention is shown in the accompanying drawings wherein:

Fig. 1 is a vertical sectional View through two separated halves of a mould.

Fig. 2 is a vertical section through an as sembled mould with the casting within the mould and shown in black.

Fig. 3 is a vertical section through the grid casting alone.

Fig. 4 is a vertical section through the separated grid, the pouring funnel being shown at the center of the figure.

Fig. 5, shows the finished grid plate in side elevation and perpendicular to the planes of the sectional views.

In the drawing a and a are the two halves of the mould and b is the inlet chamber for conducting molten metal to the grid The fundamental difmoulds, and forming the solid castin portion 6. In the mouldare grid portions 0 for forming the cast grids 0. At d are mould panels for facilitating the pouring of the metal and for forming the grid lugs d.

This construction serves for the simultaneous production of two grid plates as clearly shown in Figs. 3 and 4 of drawings. A finished casting or cast grid is illustrated in section in Figure 3, the separation of the grid plates being effected from the common dividing plate in the directions 00, a" and 3 7 by a high speed circular saw. A finished grid plate produced in accordance with the present method is shown in Figure 5.

What I claim is 1. Aprocess for casting fine mesh grid plates for accumulators, comprising intro- I ducing molten metal into the grid mould from a casting chamber lying parallel and adjacent to the grid mould surface, the molten metal entering the grid mould perpendicularly to the surface thereof, and separating the cast grid from the plate formed in the casting chamber by means of a cut parallel to the grid surface.

2. Amethod for producing accumulator grid plates and more especially fine meshed accumulator metalplates, comprising introducing the metal into the mould through a wide casting space which is disposed parallel to the grid mould surface so that the metal penetrates at right angles into the meshes of the grid plate mould, the grid thus formed being subsequently separated from the core formed by the solidification of the metal in the wide casting space.

3. A. method for producing accumulator grid plates and more especially fine meshed accumulator grid plates, comprising introducing the metal into the mould through a wide casting space which is disposed parallel to two grid mould surfaces at either side of the casting space so that the metal penetrates at right angles into the meshes of the grid plate moulds, the grids thus formed being subsequently separated from the core formed by the solidification of the metal in the wide casting space.

In testimony whereof I affix my signature.

HUGO KELLER. 

